From: Pavel Machek <pavel@ucw.cz>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Octavian Purdila <octavian.purdila@intel.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
"Tirdea, Irina" <irina.tirdea@intel.com>,
Oliver Neukum <oneukum@suse.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"linux-input@vger.kernel.org" <linux-input@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Brown, Len" <len.brown@intel.com>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>
Subject: Re: [RFC PATCH] PM / Runtime: runtime: Add sysfs option for forcing runtime suspend
Date: Mon, 21 Sep 2015 22:20:13 +0200 [thread overview]
Message-ID: <20150921202013.GA11745@amd> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1509211035000.1713-100000@iolanthe.rowland.org>
On Mon 2015-09-21 10:38:46, Alan Stern wrote:
> On Mon, 21 Sep 2015, Pavel Machek wrote:
>
> > > > In fact, then, what you need seems to be the feature discussed by Alan
> > > > and me some time ago allowing remote wakeup do be disabled for runtime
> > > > PM from user space as that in combination with autosuspend should
> > > > address your use case.
> > >
> > > That, plus they want the touchscreen to go into runtime suspend
> > > whenever the screen is off (was this not the main reason for the
> > > patch?).
> > >
> > > It seems to me that it should be possible to arrange for this to happen
> > > simply by making userspace close the touchscreen device when the screen
> > > is turned off. Or am I missing something?
> >
> > Well... that's not what existing userspace expects. Your X windows
> > server will not close the touchscreen.
>
> Surely that's a userspace issue, rather than a kernel problem? The X
> server does have some notion of power management and power savings; why
> not extend that notion to include touchscreens?
Well... once upon a time, it was kernel job to mask differences
between different hardware platforms.
In a way, the hardware is "buggy" -- if your mouse clicked randomly
when you were not holding it in your hand it would be buggy... and it
would be nice for kernel to fix that "bug".
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2015-09-21 20:20 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-07 20:42 [RFC PATCH] PM / Runtime: runtime: Add sysfs option for forcing runtime suspend Irina Tirdea
2015-09-07 21:20 ` Rafael J. Wysocki
2015-09-08 1:10 ` Tirdea, Irina
2015-09-08 7:35 ` Oliver Neukum
2015-09-08 20:56 ` Rafael J. Wysocki
2015-09-08 22:25 ` Ulf Hansson
2015-09-08 23:50 ` Rafael J. Wysocki
2015-09-09 11:13 ` Octavian Purdila
2015-09-09 12:22 ` Rafael J. Wysocki
2015-09-09 13:55 ` Oliver Neukum
2015-09-09 15:02 ` Octavian Purdila
2015-09-09 20:25 ` Rafael J. Wysocki
2015-09-10 9:38 ` Oliver Neukum
2015-09-21 12:29 ` Pavel Machek
2015-09-09 15:20 ` Alan Stern
2015-09-09 20:35 ` Rafael J. Wysocki
2015-09-09 20:16 ` Colin Cross
2015-09-21 12:30 ` Pavel Machek
2015-09-21 14:38 ` Alan Stern
2015-09-21 16:16 ` Dmitry Torokhov
2015-09-21 16:34 ` Alan Stern
2015-09-21 16:59 ` Dmitry Torokhov
2015-09-21 17:32 ` Alan Stern
2015-09-21 18:00 ` Dmitry Torokhov
2015-09-21 20:02 ` Alan Stern
2015-09-21 20:56 ` Dmitry Torokhov
2015-09-22 12:05 ` Oliver Neukum
2015-09-22 14:15 ` Alan Stern
2015-09-22 14:31 ` Oliver Neukum
2015-09-22 15:22 ` Alan Stern
2015-09-23 3:03 ` Oliver Neukum
2015-09-23 7:27 ` Octavian Purdila
2015-09-23 14:55 ` Alan Stern
2015-09-25 0:43 ` Rafael J. Wysocki
2015-09-25 14:29 ` Alan Stern
2015-09-25 20:15 ` Rafael J. Wysocki
2015-09-25 21:13 ` Alan Stern
2015-09-25 21:52 ` Rafael J. Wysocki
2015-09-25 23:04 ` Rafael J. Wysocki
2015-09-26 15:20 ` Alan Stern
2015-09-27 13:41 ` Rafael J. Wysocki
2015-09-27 14:27 ` Alan Stern
2015-09-28 13:41 ` Rafael J. Wysocki
2015-09-28 14:29 ` Alan Stern
2015-09-28 20:03 ` Rafael J. Wysocki
2015-09-28 20:23 ` Alan Stern
2015-10-04 15:16 ` Pavel Machek
2015-09-27 17:02 ` Pavel Machek
2015-09-28 13:47 ` Rafael J. Wysocki
2015-09-21 20:20 ` Pavel Machek [this message]
2015-09-08 14:44 ` Alan Stern
2015-09-08 15:15 ` Rafael J. Wysocki
2015-09-08 15:00 ` Alan Stern
2015-09-08 20:28 ` Rafael J. Wysocki
2015-09-09 15:22 ` Alan Stern
2015-09-09 6:26 ` Oliver Neukum
2015-09-09 14:33 ` Alan Stern
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